HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Santa Rosa (STS) to Illinois from $135

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STS — ORD
Jun 23 — Jun 301
From?
To?
Sun 6/23
Sun 6/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

How far in advance should I book a flight from Santa Rosa to Illinois?

Travelers have found it’s best to book a flight 47 days in advance to save up to 43% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 47 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Santa Rosa to Illinois 1-2 weeks in advance for as low as $322, or $475 for flights within the next 24 hours.

What is the cheapest month to fly from Santa Rosa to Illinois?

September is one of the best times of the year to fly to Illinois from Santa Rosa. Prices for September average $316 per person but you can even find prices for as low as $100. The most expensive prices can be found in the month of March. Opting for a September flight can save you 19% on your journey compared to booking in March

What is the cheapest time of day to fly from STS to IL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Santa Rosa to Illinois as you normally would.

Cheap Santa Rosa to Illinois flights in June & July 2024

Find cheap flight options from Santa Rosa to Illinois specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,263,674 searches. Prices were last updated on June 18, 2024.
Listed are some of the best fares we've found on flights departing from Santa Rosa to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Tue 7/162:44 pmSTS - ORD
1 stop6h 55mAlaska Airlines
Tue 7/239:22 pmORD - STS
1 stop18h 28mAlaska Airlines
Deal found 6/16$506
Tue 7/162:44 pmSTS - ORD
1 stop6h 55mAlaska Airlines
Tue 7/239:22 pmORD - STS
2 stops15h 19mAlaska Airlines
Deal found 6/16$511
Tue 7/910:21 amSTS - ORD
2 stops16h 19mAlaska Airlines
Sun 7/146:35 amORD - STS
2 stops13h 25mAlaska Airlines
Deal found 6/18$512
Thu 7/44:14 pmSTS - STL
1 stop5h 36mAmerican Airlines
Mon 7/85:22 amSTL - STS
1 stop8h 26mAmerican Airlines
Deal found 6/17$518
Tue 7/92:44 pmSTS - ORD
1 stop11h 56mAlaska Airlines
Sun 7/146:35 amORD - STS
2 stops13h 25mAlaska Airlines
Deal found 6/18$534
Tue 7/163:47 pmSTS - ORD
2 stops11h 28mAlaska Airlines
Tue 7/239:22 pmORD - STS
2 stops19h 43mAlaska Airlines
Deal found 6/16$543
Tue 7/304:11 pmSTS - ORD
2 stops13h 14mAmerican Airlines
Mon 8/55:00 amORD - STS
1 stop8h 48mAmerican Airlines
Deal found 6/18$547
Tue 7/912:28 pmSTS - ORD
1 stop9h 18mAmerican Airlines
Sun 7/145:00 amORD - STS
1 stop8h 48mAmerican Airlines
Deal found 6/18$558
Thu 7/44:14 pmSTS - STL
2 stops15h 34mAmerican Airlines
Mon 7/87:00 amSTL - STS
1 stop6h 48mAmerican Airlines
Deal found 6/17$607

Santa Rosa to Illinois 2024 flight deals

Discover exclusive flight deals for travel between Santa Rosa and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated June 18, 2024.
Listed are some of the best fares we've found on flights departing from Santa Rosa to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Mon 9/2311:49 amSTS - ORD
2 stops15h 41mAlaska Airlines
Thu 9/266:00 amORD - STS
2 stops11h 58mAlaska Airlines
Deal found 6/18$338
Mon 9/2311:49 amSTS - ORD
2 stops15h 41mAlaska Airlines
Fri 9/279:10 pmORD - STS
1 stop18h 36mAlaska Airlines
Deal found 6/18$350
Mon 9/2311:49 amSTS - ORD
2 stops15h 41mAlaska Airlines
Fri 9/277:26 pmORD - STS
2 stops16h 52mAlaska Airlines
Deal found 6/18$355
Mon 9/2311:49 amSTS - ORD
2 stops15h 41mAlaska Airlines
Thu 9/265:59 pmORD - STS
1 stop21h 47mAlaska Airlines
Deal found 6/18$380
Sat 11/212:30 pmSTS - ORD
2 stops51h 18mAlaska Airlines
Tue 11/55:57 pmORD - STS
2 stops30h 48mAlaska Airlines
Deal found 6/17$402
Mon 9/2310:58 amSTS - ORD
1 stop16h 32mAlaska Airlines
Fri 9/279:10 pmORD - STS
1 stop18h 36mAlaska Airlines
Deal found 6/18$403
Sat 11/28:22 amSTS - ORD
2 stops55h 26mAlaska Airlines
Tue 11/57:00 amORD - STS
1 stop28h 18mAlaska Airlines
Deal found 6/17$407
Sat 11/27:00 amSTS - ORD
1 stop7h 58mAlaska Airlines
Tue 11/57:00 amORD - STS
1 stop12h 35mAlaska Airlines
Deal found 6/17$430
Tue 7/162:44 pmSTS - ORD
1 stop6h 55mAlaska Airlines
Tue 7/239:22 pmORD - STS
1 stop18h 28mAlaska Airlines
Deal found 6/16$506

Santa Rosa to Illinois flights leaving soon

Find last-minute flight options from Santa Rosa to Illinois for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated June 18, 2024.
Check out these flights departing soon from Santa Rosa to Illinois. Users should examine the flight details to ensure there are no surprises.
Mon 6/2410:55 amSTS - ORD
3 stops27h 07mMultiple Airlines
Sat 6/298:26 pmORD - STS
2 stops27h 24mMultiple Airlines
Deal found 6/17$607
Mon 6/247:45 amSTS - ORD
2 stops20h 15mMultiple Airlines
Sat 6/298:26 pmORD - STS
2 stops27h 24mMultiple Airlines
Deal found 6/17$613
Mon 6/2410:55 amSTS - ORD
3 stops27h 07mMultiple Airlines
Sat 6/2912:32 pmORD - STS
3 stops35h 18mMultiple Airlines
Deal found 6/17$635
Mon 6/247:45 amSTS - ORD
1 stop11h 32mMultiple Airlines
Sat 6/298:26 pmORD - STS
2 stops27h 24mMultiple Airlines
Deal found 6/17$654
Mon 6/247:03 pmSTS - ORD
1 stop8h 12mAlaska Airlines
Sat 6/298:00 amORD - STS
1 stop12h 16mAlaska Airlines
Deal found 6/17$802
Wed 6/264:14 pmSTS - ORD
1 stop6h 04mAmerican Airlines
Sat 6/295:00 amORD - STS
1 stop8h 53mAmerican Airlines
Deal found 6/18$868
Wed 6/264:14 pmSTS - ORD
1 stop6h 04mAmerican Airlines
Sat 6/297:05 amORD - STS
2 stops10h 38mAmerican Airlines
Deal found 6/18$873
Wed 6/263:47 pmSTS - ORD
2 stops11h 28mAlaska Airlines
Sat 6/296:00 amORD - STS
2 stops14h 16mAlaska Airlines
Deal found 6/18$949

One-way flights to Illinois from Santa Rosa

Search for one-way flight options from Santa Rosa to Illinois. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated June 18, 2024.
Some of the best available deals we've found on one-way flights from Santa Rosa to Illinois. Users in need of a round-trip flight from Santa Rosa to Illinois instead should update the search form at the top of page.
Thu 7/1812:20 pmSTS - ORD
2 stops15h 46mMultiple Airlines
Deal found 6/17$135
Mon 8/57:45 amSTS - ORD
1 stop7h 55mMultiple Airlines
Deal found 6/17$152
Mon 9/96:38 pmSTS - ORD
2 stops31h 59mAlaska Airlines
Deal found 6/17$163
Mon 9/97:45 amSTS - ORD
1 stop7h 37mMultiple Airlines
Deal found 6/17$164
Thu 7/1812:20 pmSTS - ORD
3 stops27h 09mMultiple Airlines
Deal found 6/17$170
Mon 8/57:45 amSTS - ORD
2 stops20h 21mMultiple Airlines
Deal found 6/17$187
Wed 8/2112:27 pmSTS - ORD
1 stop9h 07mAmerican Airlines
Deal found 6/17$224
Wed 8/2111:49 amSTS - ORD
2 stops14h 48mAlaska Airlines
Deal found 6/17$232
Tue 7/24:14 pmSTS - ORD
2 stops13h 11mAmerican Airlines
Deal found 6/17$238

Find flights from Santa Rosa to Illinois within your budget

Customize your flight search to find flights from Santa Rosa to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated June 18, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$338 - $558

Route

Depart

Return

Price

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 9/23

2 stops15h 41m

Chicago O'Hare Intl

Thu 9/26

2 stops11h 58m

$338

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 9/23

2 stops15h 41m

Chicago O'Hare Intl

Fri 9/27

1 stop18h 36m

$350

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 9/23

2 stops15h 41m

Chicago O'Hare Intl

Fri 9/27

2 stops16h 52m

$355

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 9/23

2 stops15h 41m

Chicago O'Hare Intl

Thu 9/26

1 stop21h 47m

$380

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 11/2

2 stops51h 18m

Chicago O'Hare Intl

Tue 11/5

2 stops30h 48m

$402

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Mon 9/23

1 stop16h 32m

Chicago O'Hare Intl

Fri 9/27

1 stop18h 36m

$403

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Sat 11/2

2 stops55h 26m

Chicago O'Hare Intl

Tue 11/5

1 stop28h 18m

$407

Santa Rosa Sonoma CountyLambert-St Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Thu 7/4

1 stop5h 36m

Lambert-St Louis

Mon 7/8

1 stop8h 26m

$518

Santa Rosa Sonoma CountyChicago O'Hare Intl

STS - ORD

STSORD

Santa Rosa Sonoma County

Tue 7/9

1 stop9h 18m

Chicago O'Hare Intl

Sun 7/14

1 stop8h 48m

$558

Flights are sorted by cheapest first

Deals found on 6/18

No data available for this route at this time. Please check back soon.

Best time to book a flight from Santa Rosa to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Santa Rosa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 18, 2024.
Read through reviews of airlines operating flights from Santa Rosa to Illinois, such as American Airlines and Alaska Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,276 reviews

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,276 reviews
Alaska Airlines
8.1
Very good
9,276 reviews

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,276 reviews

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Santa Rosa to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Santa Rosa to Illinois?

    Most people fly from Santa Rosa Sonoma County (STS) if they book a flight from Santa Rosa to Illinois. Santa Rosa Sonoma County is conveniently located just 7.2 mi from Santa Rosa’s city center.

  • Can I find flights from Santa Rosa to Illinois for under $400 on Cheapflights?

    Yes, there are multiple flights from Santa Rosa to Illinois for under $400. The cheapest flight booked recently is on Alaska Airlines for just $338, but on average you can expect to pay $486.

  • Are there last-minute flights available from Santa Rosa to Illinois for under $700?

    There are currently 8+ open flights from Santa Rosa to Illinois within the next 7 days for less than $700.

  • What are the most popular routes from Santa Rosa to Illinois?

    When deciding which route to take from Santa Rosa to Illinois consider Santa Rosa Sonoma County - Chicago O'Hare Intl, Santa Rosa Sonoma County - Moline Quad-City or Santa Rosa Sonoma County - Lambert-St Louis as they are the most popular.

  • What does STS to ORD mean?

    Great question - STS to ORD just means Santa Rosa Sonoma County Airport to Chicago O'Hare Intl Airport. Now you’ll know what these unique codes when you look for flights! Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Santa Rosa to Illinois that include extra baggage allowance?

    The amount of baggage you can bring on your Santa Rosa to Illinois flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Santa Rosa to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Santa Rosa to Illinois flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Santa Rosa to Illinois that include hotel bookings?

    Yes. In addition to deals on Santa Rosa to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Santa Rosa to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santa Rosa to Illinois.

  • Can I find deals for business class flights from Santa Rosa to Illinois?

    Yes. Cheapflights offers flight deals from Santa Rosa to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Santa Rosa to Illinois that allow pets onboard?

    Many airlines flying from Santa Rosa to Illinois offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Santa Rosa to Illinois?

    Yes, you can often find last-minute deals on Santa Rosa to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Santa Rosa to Illinois flight deals updated?

    The Santa Rosa to Illinois flight deals you see on this page were last updated on 6/18.

  • What is the cheapest month to book a flight from Santa Rosa to Illinois?

    Currently, February is the cheapest month in which you can book a flight from Santa Rosa to Illinois (average of $244). Flying from Santa Rosa to Illinois in July is currently the most expensive (average of $320). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Santa Rosa to Illinois
See prices for flight routes from nearby airports that may be better suited for you.

Los Angeles to Newark flights
Los Angeles to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Seattle flights
San Francisco to Seattle flights
Los Angeles to O'Hare Intl flights
Los Angeles to LaGuardia flights
Los Angeles to Las Vegas flights
San Francisco to Newark flights
Los Angeles to Miami flights
Los Angeles to Boston flights
Santa Ana to Seattle flights
San Francisco to Las Vegas flights
Los Angeles to Orlando flights
San Francisco to Honolulu flights
San Francisco to LaGuardia flights
Ontario to Dallas/Fort Worth flights
Ontario to Seattle flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
San Francisco to O'Hare Intl flights
San Diego to Seattle flights
Los Angeles to Hobby flights
San Francisco to Boston flights
Burbank to Seattle flights
Los Angeles to Atlanta flights
San Jose to Seattle flights
Los Angeles to Fort Lauderdale flights
Burbank to Las Vegas flights
Oakland to Las Vegas flights
Ontario to John F Kennedy Intl flights
Oakland to Newark flights
Los Angeles to George Bush Intcntl flights
Santa Ana to Las Vegas flights
Los Angeles to Kahului flights
Los Angeles to Reagan-National flights
Burbank to Newark flights
Los Angeles to Midway flights
Los Angeles to Oakland flights
San Francisco to Dallas/Fort Worth flights
San Diego to John F Kennedy Intl flights
San Francisco to Denver flights
Oakland to Los Angeles flights
Burbank to Dallas/Fort Worth flights
Oakland to Seattle flights
Los Angeles to Portland flights
Los Angeles to Baltimore flights
Burbank to LaGuardia flights

Top airline flying from Santa Rosa to Illinois

Discover the top airline that operate flights from Santa Rosa to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated June 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$376Average$632FlexibilityNo cancel feeOn-time71%
Boston to Hawaii flights
Austin to Houston flights
Omaha to Denver flights
Boston to Phoenix flights
Phoenix to Houston flights
Austin to Dallas flights
Washington, D.C. to New York flights
Las Vegas to Houston flights
Los Angeles to Dallas flights
Miami to New York flights
Washington, D.C. to London flights
Santa Rosa to Indiana flights

Search flights from Santa Rosa to Illinois by cabin class

Find flights from Santa Rosa to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Zadar
Flights to Hakodate
Flights to Rhinelander Oneida County
Flights to Virac
Flights to Mason City
Flights to Hyannis Barnstable
Flights to Brainerd Crow Wing County
Flights to Komatsu
Flights to Pellston Emmet County
Flights to Miyakojima Hirara
Flights to Leh
Flights to Riverton
Flights to Neiva La Marguita
Flights to Devils Lake
Flights to Laayoune Hassan I
Flights to Edremit/Korfez
Flights to Trabzon
Flights to Surigao
Flights to Liberal
Flights to Alghero-Fertilia
Flights to Provincetown
Flights to Urumqi
Flights to Perpignan Llabanere
Flights to Karpathos
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines